Google has taken a strong stance on mobile SEO, announcing there will be demotions if your site is not mobile friendly or is misconfigured when it comes to being mobile friendly.

Google said the demotion will only impact mobile, smartphone friendly, search results and only impact web pages that are not smartphone friendly or misconfigured when it comes to being smartphone friendly.

(1) Faulty redirects such as pointing individual pages on your site to your mobile friendly home page, as opposed to a mobile friendly version of that specific page. When possible, Google may even try to fix that for you.